geolocation

问题 I need to allow travelers to use google maps to plot a route, and then query my database of points of interest (let's say, McDonald's locations) and then show all of these locations that are within a mile or two of the route they will be taking. The question is, how do I efficiently take the "driving directions" information that comes back from google (essentially an array of lat/long pairs), and turn that into an sql query to get locations that fall within a certain distance from the route?

问题 I'm looking for an open source app or library to track user location in the background. Now I'm trying to do it with CLLocation and background tasks, but accuracy is not enough for my case. Could you explain, how apps, like "moves", "runkeeper", "endmondo", creates my route? Should I use Accelerometer or/and compass to create a route between CLLocation background points? Some code: //location manager init self.locationManager = [[CLLocationManager alloc] init]; self.locationManager

问题 I have seen so many functions but it happens to work only for MySQL or Postgresql. I want the equivalent logic for PHP. I'm doing some comparisons, like I have this data that were being produced when created. Lat: 56.130366 Long: -106.34677099999 Later on, I want to check if this coordinates will fall within a radius of another coordinates. Lat: 57.223366 Long: -106.34675644699 radius: 100000 ( meters ) Thanks in advance! 回答1: Thanks for the help. Below is an example function that takes two

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 3 years ago . I had found couple of node.js modules for finding the information about client location and network using ip address. Requirements: Location - country, city, state, latitude, longitude etc. Network - Internet service Provider, Internet connection type and internet speed etc. Data Accuracy - maximum possibility.

问题 I need to develop a solution that will provide the ability for a user to search based on a city and state. The user should have the ability to request that the search results include not just matches for that city and state, but also include matches in a 25, 50, 100 mile radius. I see that job sites do this type of thing. How is this done and are there vendors that provide open API's for it? Thanks 回答1: It seems that what you're looking for is a GIS (Geographical Information System) in which

问题 I need to create a page that takes 2 addresses (to and from), plots the route AND areas within 1 mile of this route, THEN figure out if any of a predefined list of thousands of lat/long coords falls within this area (w/ 1 mile, along the route) I'm using google-maps v3 api and the routeboxer class. Here is a good example: http://google-maps-utility-library-v3.googlecode.com/svn/trunk/routeboxer/examples/routeboxer-v3.html As you can see, #1 and #2 are basically taken care of by this

问题 I have a geolocation pair latitude/longitude, is there any way/tool to get the corresponding time zone? 回答1: A website called EarthTools has a web service for that. http://www.earthtools.org/webservices.htm#timezone You can pass in latitude and longitude like so: h ttp://www.earthtools.org/timezone/40.71417/-74.00639 And it spits out the time zone and a bunch of other info: <?xml version="1.0" encoding="ISO-8859-1" ?> <timezone xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi

问题 I have a large DataFrame with an address column: data addr 0 0.617964 IN,Krishnagiri,635115 1 0.635428 IN,Chennai,600005 2 0.630125 IN,Karnal,132001 3 0.981282 IN,Jaipur,302021 4 0.715813 IN,Chennai,600005 ... and I've written the following function to replace the address with the longitude and latitude coordinates of the address: from geopy.geocoders import Nominatim geo_locator = Nominatim(user_agent="MY_APP_ID") def get_coordinates(addr): location = geo_locator.geocode(addr) if location is

问题 I'm setting up a iPhone tracking system for my friends, so they can submit their location to my website by their iPhone, anywhere, anytime - by WiFi or cellular data. The website will use Google Maps for their coordination's so that my other friends can track where they are, however, it is the accuracy of the IP to coordinates to Google Maps is what I'm concerned about, exactly how accurate is it to use Google Maps that would track down the locations by an IP address? I was thinking about 95%

问题 I want to use geolocation and direction function, but there is google is not defined error. the code is as below: function loadScript() { var script = document.createElement('script'); script.type = 'text/javascript'; script.src = "https://maps.googleapis.com/maps/api/js?key=mykey&sensor=true" + "&callback=initialize"; document.body.appendChild(script); } It seems that the loadScript does not work! var mapOptions = { zoom : 13, mapTypeId : google.maps.MapTypeId.ROADMAP }; map = new google